A laser trimming machine for the corners of metal nameplates

Abstract

The present invention belongs to the technical field of metal sign processing, and particularly relates to a laser trimming machine for the edges of metal signs, which comprises a numerical control coordinate assembly and a cutting table arranged vertically in sequence. A laser head is installed on the numerical control coordinate assembly. The laser trimming machine further comprises a guiding member, a loading cup and a horn cup. The guiding member is arranged on the back of the metal sign. Two metal wires, an LED lamp and a lithium battery connected between the two metal wires are arranged inside the guiding member. A guiding hole matched with the guiding member and a negative pressure member for sucking the metal sign are arranged at the opening of the loading cup. When trimming, the metal sign is positioned relative to the guiding hole through the guiding member so as to face the laser head, and the edge of the metal sign is avoided from the loading cup and the negative pressure member. The present invention can avoid the edge of the metal sign while quickly positioning, leave a falling space for the cut waste edges, and cooperate with a conductive coolant to assist in heat dissipation and indicating the in-place state during the trimming process.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal sign processing, and particularly relates to a laser trimming machine for the edges of metal signs. Background Art

[0002] During the processing of metal signs, laser trimming is fast, and one trimming can be completed, improving production efficiency. Moreover, this laser trimming method generally involves high-temperature ablation, and the cutting edge is flat and smooth, without defects such as burrs and cracks.

[0003] Metal signs come in various shapes, such as square, oval, triangle, etc. Even some high-end signs have a flower-shaped edge. The metal sign can be placed flat on the hollow table, and the laser beam emitted by the laser head is used for cutting to remove the excess waste edge or cut out a flower shape, rounded corners, etc. However, there are still the following deficiencies:

[0004] When loading the metal sign, manual positioning and centering are often required to facilitate the laser head to find its edge. Manual positioning is inefficient, and each metal sign needs to be manually positioned in the loading area, which is not conducive to shortening the positioning preparation time before trimming;

[0005] The metal sign uses a fixture to position its four sides, blocking its edge and preventing the waste edge from falling off after cutting. This requires the staff to separate the waste edge, and each metal sign needs to be tidied up after trimming, which is time-consuming and laborious. Summary of the Invention

[0006] The purpose of the present invention is to provide a laser trimming machine for the edges of metal signs, which can quickly position while avoiding the edges of the metal signs, leaving a dropping space for the cut waste edge, and cooperating with a conductive coolant to assist in heat dissipation and indicating the in-place state during the trimming process.

[0007] The technical solution adopted by the present invention is specifically as follows:

[0008] A laser trimming machine for the edges of metal signs, including a numerical control coordinate assembly and a cutting table arranged vertically in sequence. A laser head is installed on the numerical control coordinate assembly, and further includes:

[0009] A guiding member, which is arranged on the back of the metal sign. Two metal wires, an LED lamp connected between the two metal wires, and a lithium battery are arranged inside the guiding member;

[0010] A loading cup, at the opening of which a guiding hole cooperating with the guiding member and a negative pressure member for sucking the metal sign are provided. When trimming, the metal sign is positioned relative to the guiding hole through the guiding member to face the laser head, and the edge of the metal sign is avoided from the loading cup and the negative pressure member. The outside of the loading cup is sequentially connected with a hollow cantilever and a rotating mechanism;

[0011] Horn cup, a support bolt, a lifting platform and a lifting mechanism are successively arranged vertically at the bottom of the horn cup. The horn cup is filled with a conductive coolant. When the metal sign faces the laser head, the lifting mechanism lifts the horn cup so that the bottom of the guiding member is immersed in the conductive coolant. The in-place signal is indicated by the light-emitting state of the LED lamp conducting electricity, and part of the heat of the metal sign and the guiding member is taken away by the volatilization of the conductive coolant for heat dissipation during trimming.

[0012] As an alternative, an alloy ring member is arranged between the tops of the guiding members. A centering ring is integrally installed on the bottom surface of the alloy ring member. An annular groove adapted to the centering ring is formed on the top surface of the loading cup. When positioning the metal sign, the centering ring is dropped by the alloy ring member to engage with the annular groove to horizontally limit the metal sign.

[0013] As an alternative, a glue storage groove and a glue starting port communicating with the glue storage groove are formed on the top surface of the alloy ring member. A magnetic block is embedded and installed on the inner wall of the glue starting port, and a pulling wire extending out of the alloy ring member is fixed to the top of the magnetic block.

[0014] As an alternative, wire grooves for placing the metal wires are formed on both sides of the guiding member. A lamp placing groove and a containing groove communicating with the wire grooves are formed inside the guiding member. Among them, the lamp placing groove is used for placing the LED lamp, and the containing groove is used for placing the lithium battery.

[0015] As an alternative, the negative pressure member includes an electric suction cup and an elastic member vertically installed at the opening of the loading cup. The end of the electric suction cup vertically penetrates through the middle of the loading cup. When sucking the metal sign, the elastic member is pressed down so that the bottom of the guiding member passes through the guiding hole.

[0016] As an alternative, the rotating mechanism includes a hollow tube and a servo motor spaced at the bottom of the cutting table. A driving gear ring is fixed to the bottom of the hollow tube, and the top is fixedly connected to one end of the hollow cantilever. A driving gear meshing with the teeth of the driving gear ring is fixed to the output end of the servo motor.

[0017] As an alternative, a main air pipe, a rotary joint and a branch pipe are successively and vertically communicated inside the hollow tube. Among them, one end of the main air pipe away from the rotary joint penetrates through the lower opening of the hollow tube. The rotary joint is rotatably installed on the inner wall of the hollow tube. An electric valve is installed on the branch pipe, and one end of the branch pipe away from the rotary joint communicates with the end of the electric suction cup.

[0018] As an optional solution, the lifting mechanism includes an electric push rod installed at the bottom of the cutting table and separated from the hollow tube. The output end of the electric push rod is installed with a metal carrier plate and a side flange plate connected to the outer side of the metal carrier plate. The electric push rod is connected to the bottom of the hollow cantilever through the side flange plate.

[0019] As an optional solution, a material waiting area with an open side and a bracket located in the material waiting area are provided on the outside of the cutting table, and the bracket is used to place the metal label.

[0020] As an optional solution, the outer sleeve of the support bolt is provided with an elastic bushing, and the top surface of the lifting platform is fixed with a positioning tube that is inserted into the support bolt. When the support bolt is inserted into the positioning tube, the horn cup is cushioned by compressing the elastic bushing.

[0021] The technical effects achieved by the present invention are:

[0022] The present invention uses a steel ruler to find the midpoint of the metal sign in advance, and adheres the guide to the back of the metal sign based on the midpoint to quickly find the reference. When trimming, the metal sign is positioned relative to the guide hole through the guide to face the laser head. At the same time, the negative pressure part is used to absorb the metal sign, and the edge of the metal sign is kept away from the loading cup and the negative pressure part. Then, the edge of the metal sign in the loading area is quickly delivered to the laser cutting area, and the central axis of the loading cup and the guide are used as the cutting reference, so that the laser beam can be quickly aligned with the edge of the metal sign, without the need for manual positioning in the loading area, which is conducive to shortening the positioning preparation time before trimming. Then, the horn cup is lifted so that the bottom of the guide is soaked in the conductive coolant, and the conductive light state of the LED lamp indicates the position signal. At the same time, the laser beam causes the temperature of the metal sign to rise, and the heat therein is transferred to the horn cup along the guide. The volatilization of the conductive coolant takes away part of the heat of the metal sign and the guide, which is used to dissipate heat during trimming to prevent the negative pressure part and the metal sign from overheating.

[0023] The present invention uses a thin sheet alloy ring to carry three guide parts to form a whole, which is convenient for sticking to the back of the metal nameplate at one time. When positioning the metal nameplate, the alloy ring is dropped to engage with the annular groove. On the one hand, it is convenient for the alloy ring to be centered on the top of the loading cup without manual centering, saving time in the positioning stage. On the other hand, it horizontally limits the metal nameplate to prevent the center of gravity of the metal nameplate from shifting and causing skew when the waste edge falls.

[0024] To facilitate the attachment of the guide to the back of the metal sign, the present invention applies a low-viscosity glue to the glue reservoir and then adheres it to the back of the metal sign. The glue forms a ring-shaped bond between the guide and the alloy ring, allowing excess glue to overflow from the glue opening, preventing the alloy ring from being padded and making loading more convenient. When removing the metal sign, the wire can be pulled firmly to drive the glue strip out of the glue reservoir along the glue opening, facilitating the debonding of the alloy ring for subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the front view of the laser trimming machine for the corners of the metal nameplate of the present invention;

[0026] Figure 2 is the front view of the cutting table of the present invention;

[0027] Figure 3 is the front view of the numerical control coordinate assembly of the present invention;

[0028] Figure 4 is the front view of the hollow tube of the present invention;

[0029] Figure 5 is the front view of the state where the electric suction cup and the main air pipe of the present invention are connected;

[0030] Figure 6 is the front view of the state where the guiding member and the loading cup are assembled of the present invention;

[0031] Figure 7 is the top view of the alloy ring part of the present invention;

[0032] Figure 8 is the front view of the state where the electric suction cup and the loading cup are assembled of the present invention;

[0033] Figure 9 is the sectional view of the guiding member of the present invention;

[0034] Figure 10 is the front view of the trigger part of the present invention;

[0035] Figure 11 is the front view of the lifting mechanism of the present invention;

[0036] Figure 12 is the front view of the horn cup of the present invention;

[0037] Figure 13 is the plan view of the applicable part of the metal nameplate of the present invention;

[0038] Figure 14 is the system block diagram of the control main board of the present invention;

[0039] Figure 15 is the circuit diagram of the LED lamp of the present invention.

[0040] In the drawings, the list of components represented by each reference numeral is as follows:

[0041] 1. Cutting table; 2. CNC coordinate assembly; 3. Laser head; 301. Laser generator; 4. Guide; 402. Glue storage tank; 403. Glue outlet; 404. Magnetic block; 405. Wire drawing; 501. Metal wire; 502. LED lamp; 503. Lithium battery; 504. Wire groove; 505. Lamp slot; 506. Accommodating groove; 6. Loading cup; 601. Guide hole; 602. Hollow cantilever; 603. Elastic member; 604. Electric suction cup; 605. Annular groove; 606. Elastic bushing; 607. Positioning tube; 7. Horn cup; 701. Support bolt; 702. Lifting platform; 8. Alloy ring part; 801. Centering ring; 9. Hollow tube; 901. Driving gear ring; 902. Driving gear; 10. Servo motor; 11. Main air pipe; 12. Rotary joint; 13. Branch pipe; 14. Electric valve; 15. Material waiting area; 16. Bracket; 17. Electric push rod; 18. Metal carrier plate; 19. Side flange plate. Detailed implementation manners

[0042] In order to make the purpose and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text only describes one or several specific implementation manners of the present invention, and does not strictly limit the scope of protection specifically claimed by the present invention.

[0043] As Figures 1 - 15 shown, a laser trimming machine for metal sign edges, the whole machine can be controlled by a control main board of model RDC6442G / S. The multi-channel uses an I / O interface for control signal transmission, and the communication with the PC supports Ethernet communication and USB communication, which can be automatically selected. As Figure 14 shown, this embodiment includes a laser head 3, a CNC coordinate assembly 2 and a cutting table 1 arranged vertically in sequence. When processing a metal sign, first place the metal sign inside the cutting table 1, move the laser head 3 through the X-axis drag chain track and Y-axis drag chain track included in the CNC coordinate assembly 2 to align with the metal sign, and then send a laser beam to the laser head through the laser generator 301 and laser restrictor on the CNC coordinate assembly 2. The laser beam is focused by the laser head 3 and emitted to the edge of the metal sign to cut off the excess waste edge.

[0044] Referring to the attached Figure 1 and Figure 2 , this embodiment is provided with a material waiting area 15 with a side open shape outside the cutting table 1 and a bracket 16 located in the material waiting area 15. The bracket 16 is fixed to the material waiting area 15 by bolts and is used for stacking and placing metal signs. The metal signs before and after trimming are placed on different brackets 16 respectively, which is convenient for distinction.

[0045] When loading materials, as Figure 13As shown, the types of metal nameplates are not limited to these four types of abcd, and the processing difficulties are also different. For example, some metal nameplates with lace have different edge shapes, and the relative reference points to the laser head 3 are also different, so that each batch of metal nameplates requires independent positioning, and the pre-preparation time is relatively long.

[0046] Refer to the appendix Figure 1 、 Figure 2 and Figure 4 , to shorten the pre-preparation time, this embodiment further includes a guide member 4, a loading cup 6, and a horn cup 7. When loading, the operator is outside the cutting table 1 and uses a steel ruler to find the midpoint of the metal nameplate, and arranges 3 guide members 4 in a circumferential array around the midpoint and bonds them to the back of the metal nameplate to quickly find the reference. A guide hole 601 matching the guide member 4 and a negative pressure member for sucking the metal nameplate are provided at the opening of the loading cup 6. When trimming, the metal nameplate is positioned relative to the guide hole 601 through the guide member 4 to face the laser head 3. At the same time, the negative pressure member sucks the metal nameplate, and the edge of the metal nameplate is avoided from the loading cup 6 and the negative pressure member. A hollow cantilever 602 and a rotating mechanism are sequentially connected to the outside of the loading cup 6. In this embodiment, the rotating mechanism rotates 4 hollow cantilevers 602 to realize the alternate loading and unloading of 4 stations. Each time it rotates 90°, the metal nameplate edge in the loading area is quickly sent to the laser cutting area. Taking the central axis of the loading cup 6 and 3 guide members 4 as the cutting reference, it is convenient for the laser beam to quickly align with the edge of the metal nameplate, and there is no need for manual positioning in the loading area, which is beneficial to shortening the positioning preparation time before trimming. After the guide member 4 drops, it is received by the horn cup 7;

[0047] Furthermore, in this embodiment, a support bolt 701, a lifting platform 702, and a lifting mechanism are sequentially arranged vertically at the bottom of the horn cup 7. The horn cup 7 is filled with conductive coolant inside. When the metal nameplate faces the laser head 3, the horn cup 7 is lifted by the lifting mechanism so that the bottom of the guide member 4 is immersed in the conductive coolant. Two metal wires 501 are arranged inside the guide member 4, and an LED lamp 502 and a lithium battery 503 connected between the two metal wires 501 are provided. As Figure 15 shown, once the two metal wires 501 contact the conductive coolant, the current will be conducted, and the in-place signal is indicated by the light-emitting state of the LED lamp 502 when it conducts electricity. At the same time, the temperature of the metal nameplate rises due to the laser beam, and the heat therein is transferred to the horn cup 7 along the guide member 4. Part of the heat of the metal nameplate and the guide member 4 is taken away through the volatilization of the conductive coolant for heat dissipation during trimming to prevent the negative pressure member and the metal nameplate from overheating;

[0048] Furthermore, the conductive coolant can be selected from ethylene glycol or HSF-300 (a conductive transparent antistatic liquid compounded with graphene / CNT). Among them, propylene glycol generally boils at 188°C, so it can be mixed with tap water, and its toxicity is minimal. It is generally used in nail polish and has almost no toxic side effects. Since the main components of HSF-300 are graphene and CNT (carbon nanotubes), these materials are relatively friendly in terms of environmental protection and are mainly dispersed with deionized water. At the same time, this liquid does not contain harmful heavy metals and other toxic substances and complies with environmental protection regulations such as SGS and REACH.

[0049] Among them, the lithium battery 503 can be selected as a No. 7 dry battery, which is small in size. The cover plate reserved on the guide member 4 can be opened for easy replacement, and the cost is relatively low. In addition, the LED lamp 502 used has low energy consumption. Only one No. 7 dry battery can provide bright light for a long time. After replacement, the cover plate reserved on the guide member 4 is tightened with screws to prevent it from falling off.

[0050] In terms of safety in this embodiment, the conductive coolant can preferably be selected as the HSF-300 solution, which is almost harmless to the human body. To a certain extent, it is convenient for the staff to safely pick up and place the conductive coolant in the horn cup 7. As Figure 12 shown, both ends of the horn cup 7 are open. The vertical opening is used to insert the metal wire 501, and the inclined opening is used to volatilize the conductive coolant.

[0051] Referring to the attached Figure 6 、 Figure 7 and Figure 8 Between the tops of the guide members 4, an alloy ring member 8 is provided. In this embodiment, a thin sheet-shaped alloy ring member 8 is selected to carry 3 guide members 4. The guide members 4 are threadedly installed on the alloy ring member 8 to form an integral body, which is convenient for being adhesively attached to the back of the metal sign at one time. Since the bottom surface of the alloy ring member 8 is integrally installed with a centering ring 801, and a ring groove 605 adapted to the centering ring 801 is opened on the top surface of the loading cup 6, when positioning the metal sign, the centering ring 801 of the alloy ring member 8 is lowered to engage with the ring groove 605. On the one hand, it is convenient for the alloy ring member 8 to be centered on the top of the loading cup 6, and on the other hand, it horizontally limits the metal sign to prevent the center of gravity of the metal sign from shifting and causing skew when the waste edge falls off.

[0052] Referring to the attached Figure 5 、 Figure 6 and Figure 7In order to facilitate the guide member 4 to be adhered to the back of the metal sign, this embodiment provides a glue storage groove 402 and a glue removal port 403 connected to the glue storage groove 402 on the top surface of the alloy ring 8. Glue with lower viscosity is applied to the glue storage groove 402 and then pasted to the back of the metal sign, so that the glue is annular and firmly adheres to the guide member 4 and the alloy ring 8. Excess glue can overflow from the glue removal port 403 to prevent the alloy ring 8 from being padded. Since a magnetic block 404 is embedded in the inner wall of the glue removal port 403 and a wire 405 extending from the alloy ring 8 is adhered to the top of the magnetic block 404, when the metal sign is removed, the wire 405 can be pulled hard to drive the glue strip along the glue removal port 403 to separate from the glue storage groove 402, making it convenient for the alloy ring 8 to be debonded for subsequent use.

[0053] Refer to the attached Figure 1 、 Figure 2 and Figure 4 The rotating mechanism in this embodiment includes a hollow tube 9 and a servo motor 10, spaced apart at the bottom of the cutting table 1. A YEJ series three-phase asynchronous motor can be used, electrically connected to the control board. A drive ring gear 901 is welded to the bottom of the hollow tube 9 and welded to one end of a hollow cantilever 602 at the top. Drive is provided by a driving gear 902 welded to the output end of the servo motor 10, which meshes with the teeth of the drive ring gear 901. Manually pressing a start button activates the servo motor 10, intermittently rotating the hollow tube 9 and the four hollow cantilever arms 602, enabling alternating loading and unloading of materials at four workstations, with each rotation of 90°. This allows the metal sign edges in the loading area to be quickly delivered to the laser cutting area. When these stop, workers can load materials at the workstation farthest from the laser head 3.

[0054] Refer to the attached Figure 6 and Figure 8 The negative pressure member of this embodiment includes an electric suction cup 604 and an elastic member 603 vertically installed at the opening of the loading cup 6, wherein the elastic member 603 is composed of a telescopic tube and a spring sleeved on the outside of the telescopic tube. The two ends of the telescopic tube are respectively welded to the inner side of the loading cup 6 and the outer side of the electric suction cup 604, and the end of the electric suction cup 604 is vertically passed through the middle of the loading cup 6. When the metal sign is sucked, the elastic member 603 is pressed down through the metal sign and the alloy ring 8, so that the bottom of the guide member 4 passes through the guide hole 601, completing the positioning and matching process. Here, the aperture of the guide hole 601 is slightly larger than the aperture of the guide member 4.

[0055] Refer to the attached Figure 4 、 Figure 5 and Figure 14The interior of the hollow tube 9 is vertically connected with the main air pipe 11, the rotary joint 12 and the branch pipe 13 in sequence. Among them, the end of the main air pipe 11 away from the rotary joint 12 is passed through the lower opening of the hollow tube 9, which can be connected to the air compression tank and the air compressor in sequence. This technical solution is a prior art and is not drawn in the figure. The air compressor is started to suck the excess air in the air compression tank to form a negative pressure condition, and the rotary joint 12 is rotatably installed on the inner wall of the hollow tube 9 through the bearing. While connecting the branch pipe 13, it facilitates the rotation of the branch pipe 13. An electric valve 14 is installed on the branch pipe 13, and the end of the branch pipe 13 away from the rotary joint 12 is connected to the end of the electric suction cup 604. Since the signal of the electric valve 14 is connected to the control main board, the electric valve 14 can be remotely controlled to open the branch pipe 13 to keep the negative pressure state. Conversely, the electric valve 14 is closed, and the branch pipe 13 is released from the negative pressure state.

[0056] Refer to the attached Figure 2 、 Figure 8 and Figure 14 The lifting mechanism includes an electric push rod 17 installed at the bottom of the cutting table 1 and separated from the hollow tube 9. The electric push rod 17 can be an electric push rod of the DTZ-1600-300-50 model and is electrically connected to the control main board. The output end of the electric push rod 17 is equipped with a metal carrier plate 18 and a side flange plate 19 connected to the outside of the metal carrier plate 18 by screws. The electric push rod 17 is connected to the bottom of the hollow cantilever 602 through the side flange plate 19. When the electric push rod 17 is started, the metal carrier plate 18, the side flange plate 19 and the hollow cantilever 602 are driven to rise to lift the horn cup 7 until the conductive coolant soaks the bottom of the guide 4. There is no need to manually move the horn cup 7, but the horn cup 7 is lowered until it is lower than the guide 4, leaving enough safety distance for loading and unloading metal signs.

[0057] Refer to the attached Figure 9 and Figure 10 In order to ensure smooth positioning, this embodiment provides wire grooves 504 for placing the metal wires 501 on both sides of the guide member 4, which can hide the metal wires 501 and prevent the metal wires 501 from scratching the inner wall of the guide hole 601. In addition, since the guide member 4 is provided with a lamp placement groove 505 and a receiving groove 506 that are connected to the wire groove 504, the lamp placement groove 505 is used to place the LED lamp 502, and the receiving groove 506 is used to place the lithium battery 503, so that the LED lamp 502 and the lithium battery 503 can be suspended in the air, avoiding the inner wall of the guide hole 601 while not contacting the conductive coolant.

[0058] Refer to the attached Figure 11 and Figure 12, an elastic bushing 606 made of fluororubber is sleeved outside the support bolt 701. The elastic bushing 606 can be deformed under pressure for buffering. The top surface of the lifting platform 702 is welded with a positioning tube 607 that fits into the support bolt 701. When the support bolt 701 is inserted into the positioning tube 607, the horn cup 7 is buffered by compressing the elastic bushing 606. Moreover, in this embodiment, the number of positioning tubes 607 can be set to 13. By horizontally changing the position of the support bolt 701 and inserting it into different positioning tubes 607, the distance between the horn cups 7 can be changed, so as to meet the requirements of metal nameplates of different shapes.

[0059] The working principle of the present invention is as follows: During feeding, outside the cutting table 1, the staff uses a steel ruler to find the midpoint of the metal nameplate, and bonds 3 guiding members 4 around the midpoint to the back of the metal nameplate to quickly find the reference. When trimming, the metal nameplate is positioned relative to the guiding holes 601 through the guiding members 4 to face the laser head 3. At the same time, the metal nameplate is sucked by the negative pressure member, and the edge of the metal nameplate is avoided from the loading cup 6 and the negative pressure member. By rotating the 4 hollow cantilevers 602 through the rotating mechanism, the alternate loading and unloading of 4 workstations is realized, and each time it rotates 90°, so as to quickly deliver the edge of the metal nameplate in the loading area to the laser cutting area.

[0060] At this time, taking the central axis of the loading cup 6 and the 3 guiding members 4 as the cutting reference, it is convenient for the laser beam to quickly align with the edge of the metal nameplate, without manual positioning in the loading area, which is beneficial to shortening the positioning preparation time before trimming.

[0061] When the metal nameplate faces the laser head 3, the horn cup 7 is lifted by the lifting mechanism, so that the bottom of the guiding member 4 is immersed in the conductive coolant. The two metal wires 501 contact the conductive coolant to conduct current, and the in-place signal is indicated by the light-emitting state of the LED lamp 502 through conduction.

[0062] Then, the laser head 3 is moved through the X-axis drag chain track and Y-axis drag chain track included in the numerical control coordinate assembly 2 to align with the metal nameplate. Then, a laser beam is sent to the laser head 3 through the laser generator 301 and the laser restrictor on the numerical control coordinate assembly 2. The laser head 3 focuses and emits it to the edge of the metal nameplate to cut off the excess waste edge. Since the edge of the metal nameplate is avoided, enough falling space is left for the cut waste edge. The temperature of the metal nameplate rises due to the laser beam, and the heat therein is transferred along the guiding member 4 to the horn cup 7. Part of the heat of the metal nameplate and the guiding member 4 is taken away through the volatilization of the conductive coolant for heat dissipation during trimming to prevent the negative pressure member and the metal nameplate from overheating.

[0063] The above are only alternative embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention are implemented by conventional means in the art without special explanation and limitation.

Claims

1. A laser trimming machine for the corners of a metal sign, comprising a numerically controlled coordinate assembly (2) and a cutting table (1) arranged vertically in sequence, wherein a laser head (3) is installed on the numerically controlled coordinate assembly (2), and it is characterized in that, Also includes: A guide member (4), the guide member (4) being arranged on the back of the metal sign, the guide member (4) being provided with two metal wires (501) and an LED lamp (502) and a lithium battery (503) connected between the two metal wires (501), an alloy ring member (8) being provided between the tops of the guide member (4), the top surface of the alloy ring member (8) being provided with a glue storage tank (402) and a glue opening (403) communicating with the glue storage tank (402), a magnetic block (404) being embedded and installed in the inner wall of the glue opening (403), and a wire (405) extending from the alloy ring member (8) being fixed on the top of the magnetic block (404); The loading cup (6) is provided with a guide hole (601) cooperating with the guide member (4) and a negative pressure member for sucking the metal sign. The negative pressure member comprises an electric suction cup (604) and an elastic member (603) vertically installed at the opening of the loading cup (6). The end of the electric suction cup (604) vertically passes through the middle of the loading cup (6). When sucking the metal sign, the elastic member (603) is pressed down to make the bottom of the guide member (4) pass through the guide hole (601). When trimming, the metal sign is relatively moved by the guide member (4). The guide hole (601) is positioned to face the laser head (3) and to allow the edge of the metal sign to avoid the loading cup (6) and the negative pressure piece. A straightening ring (801) is integrally installed on the bottom surface of the alloy ring (8). An annular groove (605) adapted to the straightening ring (801) is provided on the top surface of the loading cup (6). When the metal sign is positioned, the straightening ring (801) is dropped through the alloy ring (8) to engage with the annular groove (605) to horizontally limit the metal sign. The outer side of the loading cup (6) is sequentially connected with a hollow cantilever (602) and a rotating mechanism. The rotating mechanism comprises a hollow tube (9) and a servo motor (10) spaced apart at the bottom of the cutting table (1); a driving gear ring (901) is fixed to the bottom of the hollow tube (9); the top is fixedly connected to one end of the hollow cantilever (602); and an active gear (902) meshing with the teeth of the driving gear ring (901) is fixed to the output end of the servo motor (10); A bull horn cup (7), wherein a support bolt (701), a lifting platform (702) and a lifting mechanism are vertically arranged at the bottom of the bull horn cup (7) in sequence. A conductive coolant is filled in the bull horn cup (7). While positioning, the lifting mechanism lifts the bull horn cup (7) so that the bottom of the guide member (4) is immersed in the conductive coolant. The LED light (502) illuminates the bottom of the guide member (4) to indicate a position signal. Moreover, the volatilization of the conductive coolant takes away part of the heat of the metal plate and the guide member (4) for heat dissipation during trimming.

2. The laser trimming machine for the corners of a metal signboard according to claim 1, wherein: Both sides of the guide member (4) are provided with wire grooves (504) for placing the metal wires (501). A lamp slot (505) and a receiving slot (506) that are both communicated with the wire grooves (504) are provided inside the guide member (4). Among them, the lamp slot (505) is used for placing the LED lamp (502), and the receiving slot (506) is used for placing the lithium battery (503).

3. A laser trimming machine for the corners of a metal signboard according to claim 1, characterized in that: A main air pipe (11), a rotary joint (12), and a branch pipe (13) are vertically and sequentially communicated inside the hollow pipe (9). Among them, one end of the main air pipe (11) far from the rotary joint (12) penetrates through the lower opening of the hollow pipe (9). The rotary joint (12) is rotatably installed on the inner wall of the hollow pipe (9). An electric valve (14) is installed on the branch pipe (13), and one end of the branch pipe (13) far from the rotary joint (12) is communicated with the end of the electric suction cup (604).

4. A laser trimming machine for the corners of a metal signboard according to claim 1, characterized in that: The lifting mechanism includes an electric push rod (17) installed at the bottom of the cutting table (1) and separated from the hollow pipe (9). The output end of the electric push rod (17) is provided with a metal carrier plate (18) and a side flange plate (19) connected to the outside of the metal carrier plate (18). The electric push rod (17) is connected to the bottom of the hollow cantilever (602) through the side flange plate (19).

5. A laser trimming machine for the corners of a metal signboard according to claim 1, characterized in that: A material waiting area (15) with an open side is arranged outside the cutting table (1), and a bracket (16) is arranged in the material waiting area (15). The bracket (16) is used for placing metal nameplates.

6. The laser trimming machine for the corners of a metal signboard according to claim 1, characterized in that: An elastic bushing (606) is sleeved outside the support bolt (701). A positioning pipe (607) that is inserted and combined with the support bolt (701) is fixed on the top surface of the lifting platform (702). When the support bolt (701) is inserted into the positioning pipe (607), the horn cup (7) is buffered by compressing the elastic bushing (606).

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